Charlotte Moorman was a bold, barrier-breaking musician and performance artist and a tireless champion of experimental art, whose avant-garde festivals in New York City brought new art forms to a broad public. To date, recognition of Moorman has been limited mostly to her collaborations with other artists, including composer John Cage and pioneering multimedia artist Nam June Paik, and to her 1967 performance of Paik s "Opera Sextronique," for which she became known as the "topless cellist" after being arrested on indecency charges. A Feast of Astonishments looks deeper to portray...